The Dewgong (29 / 108) card can be found in the Evolutions set.
Recently sold 2 times and based on those sales is worth around £0.91.
Currently, there are 21 open listings for this card on ebay.
This card sells in the range of £0.83 to £0.99, making it very stable.
This Rare card was illustrated by Mitsuhiro Arita.